git.oblomov.eu Git - linux-2.6/blob - drivers/scsi/qla2xxx/qla_mid.c

   1 /*
   2  * QLogic Fibre Channel HBA Driver
   3  * Copyright (c)  2003-2008 QLogic Corporation
   4  *
   5  * See LICENSE.qla2xxx for copyright and licensing details.
   6  */
   7 #include "qla_def.h"
   8
   9 #include <linux/version.h>
  10 #include <linux/moduleparam.h>
  11 #include <linux/vmalloc.h>
  12 #include <linux/smp_lock.h>
  13 #include <linux/list.h>
  14
  15 #include <scsi/scsi_tcq.h>
  16 #include <scsi/scsicam.h>
  17 #include <linux/delay.h>
  18
  19 void
  20 qla2x00_vp_stop_timer(scsi_qla_host_t *vha)
  21 {
  22         if (vha->parent && vha->timer_active) {
  23                 del_timer_sync(&vha->timer);
  24                 vha->timer_active = 0;
  25         }
  26 }
  27
  28 static uint32_t
  29 qla24xx_allocate_vp_id(scsi_qla_host_t *vha)
  30 {
  31         uint32_t vp_id;
  32         scsi_qla_host_t *ha = vha->parent;
  33
  34         /* Find an empty slot and assign an vp_id */
  35         down(&ha->vport_sem);
  36         vp_id = find_first_zero_bit(ha->vp_idx_map, ha->max_npiv_vports + 1);
  37         if (vp_id > ha->max_npiv_vports) {
  38                 DEBUG15(printk ("vp_id %d is bigger than max-supported %d.\n",
  39                     vp_id, ha->max_npiv_vports));
  40                 up(&ha->vport_sem);
  41                 return vp_id;
  42         }
  43
  44         set_bit(vp_id, ha->vp_idx_map);
  45         ha->num_vhosts++;
  46         vha->vp_idx = vp_id;
  47         list_add_tail(&vha->vp_list, &ha->vp_list);
  48         up(&ha->vport_sem);
  49         return vp_id;
  50 }
  51
  52 void
  53 qla24xx_deallocate_vp_id(scsi_qla_host_t *vha)
  54 {
  55         uint16_t vp_id;
  56         scsi_qla_host_t *ha = vha->parent;
  57
  58         down(&ha->vport_sem);
  59         vp_id = vha->vp_idx;
  60         ha->num_vhosts--;
  61         clear_bit(vp_id, ha->vp_idx_map);
  62         list_del(&vha->vp_list);
  63         up(&ha->vport_sem);
  64 }
  65
  66 static scsi_qla_host_t *
  67 qla24xx_find_vhost_by_name(scsi_qla_host_t *ha, uint8_t *port_name)
  68 {
  69         scsi_qla_host_t *vha;
  70
  71         /* Locate matching device in database. */
  72         list_for_each_entry(vha, &ha->vp_list, vp_list) {
  73                 if (!memcmp(port_name, vha->port_name, WWN_SIZE))
  74                         return vha;
  75         }
  76         return NULL;
  77 }
  78
  79 /*
  80  * qla2x00_mark_vp_devices_dead
  81  *      Updates fcport state when device goes offline.
  82  *
  83  * Input:
  84  *      ha = adapter block pointer.
  85  *      fcport = port structure pointer.
  86  *
  87  * Return:
  88  *      None.
  89  *
  90  * Context:
  91  */
  92 static void
  93 qla2x00_mark_vp_devices_dead(scsi_qla_host_t *vha)
  94 {
  95         fc_port_t *fcport;
  96         scsi_qla_host_t *pha = to_qla_parent(vha);
  97
  98         list_for_each_entry(fcport, &pha->fcports, list) {
  99                 if (fcport->vp_idx != vha->vp_idx)
 100                         continue;
 101
 102                 DEBUG15(printk("scsi(%ld): Marking port dead, "
 103                     "loop_id=0x%04x :%x\n",
 104                     vha->host_no, fcport->loop_id, fcport->vp_idx));
 105
 106                 atomic_set(&fcport->state, FCS_DEVICE_DEAD);
 107                 qla2x00_mark_device_lost(vha, fcport, 0, 0);
 108         }
 109 }
 110
 111 int
 112 qla24xx_disable_vp(scsi_qla_host_t *vha)
 113 {
 114         int ret;
 115
 116         ret = qla24xx_control_vp(vha, VCE_COMMAND_DISABLE_VPS_LOGO_ALL);
 117         atomic_set(&vha->loop_state, LOOP_DOWN);
 118         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 119
 120         /* Delete all vp's fcports from parent's list */
 121         qla2x00_mark_vp_devices_dead(vha);
 122         atomic_set(&vha->vp_state, VP_FAILED);
 123         vha->flags.management_server_logged_in = 0;
 124         if (ret == QLA_SUCCESS) {
 125                 fc_vport_set_state(vha->fc_vport, FC_VPORT_DISABLED);
 126         } else {
 127                 fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
 128                 return -1;
 129         }
 130         return 0;
 131 }
 132
 133 int
 134 qla24xx_enable_vp(scsi_qla_host_t *vha)
 135 {
 136         int ret;
 137         scsi_qla_host_t *ha = vha->parent;
 138
 139         /* Check if physical ha port is Up */
 140         if (atomic_read(&ha->loop_state) == LOOP_DOWN  ||
 141                 atomic_read(&ha->loop_state) == LOOP_DEAD ) {
 142                 vha->vp_err_state =  VP_ERR_PORTDWN;
 143                 fc_vport_set_state(vha->fc_vport, FC_VPORT_LINKDOWN);
 144                 goto enable_failed;
 145         }
 146
 147         /* Initialize the new vport unless it is a persistent port */
 148         down(&ha->vport_sem);
 149         ret = qla24xx_modify_vp_config(vha);
 150         up(&ha->vport_sem);
 151
 152         if (ret != QLA_SUCCESS) {
 153                 fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
 154                 goto enable_failed;
 155         }
 156
 157         DEBUG15(qla_printk(KERN_INFO, ha,
 158             "Virtual port with id: %d - Enabled\n", vha->vp_idx));
 159         return 0;
 160
 161 enable_failed:
 162         DEBUG15(qla_printk(KERN_INFO, ha,
 163             "Virtual port with id: %d - Disabled\n", vha->vp_idx));
 164         return 1;
 165 }
 166
 167 static void
 168 qla24xx_configure_vp(scsi_qla_host_t *vha)
 169 {
 170         struct fc_vport *fc_vport;
 171         int ret;
 172
 173         fc_vport = vha->fc_vport;
 174
 175         DEBUG15(printk("scsi(%ld): %s: change request #3 for this host.\n",
 176             vha->host_no, __func__));
 177         ret = qla2x00_send_change_request(vha, 0x3, vha->vp_idx);
 178         if (ret != QLA_SUCCESS) {
 179                 DEBUG15(qla_printk(KERN_ERR, vha, "Failed to enable receiving"
 180                     " of RSCN requests: 0x%x\n", ret));
 181                 return;
 182         } else {
 183                 /* Corresponds to SCR enabled */
 184                 clear_bit(VP_SCR_NEEDED, &vha->vp_flags);
 185         }
 186
 187         vha->flags.online = 1;
 188         if (qla24xx_configure_vhba(vha))
 189                 return;
 190
 191         atomic_set(&vha->vp_state, VP_ACTIVE);
 192         fc_vport_set_state(fc_vport, FC_VPORT_ACTIVE);
 193 }
 194
 195 void
 196 qla2x00_alert_all_vps(scsi_qla_host_t *ha, uint16_t *mb)
 197 {
 198         int i, vp_idx_matched;
 199         scsi_qla_host_t *vha;
 200
 201         if (ha->parent)
 202                 return;
 203
 204         for_each_mapped_vp_idx(ha, i) {
 205                 vp_idx_matched = 0;
 206
 207                 list_for_each_entry(vha, &ha->vp_list, vp_list) {
 208                         if (i == vha->vp_idx) {
 209                                 vp_idx_matched = 1;
 210                                 break;
 211                         }
 212                 }
 213
 214                 if (vp_idx_matched) {
 215                         switch (mb[0]) {
 216                         case MBA_LIP_OCCURRED:
 217                         case MBA_LOOP_UP:
 218                         case MBA_LOOP_DOWN:
 219                         case MBA_LIP_RESET:
 220                         case MBA_POINT_TO_POINT:
 221                         case MBA_CHG_IN_CONNECTION:
 222                         case MBA_PORT_UPDATE:
 223                         case MBA_RSCN_UPDATE:
 224                                 DEBUG15(printk("scsi(%ld)%s: Async_event for"
 225                                     " VP[%d], mb = 0x%x, vha=%p\n",
 226                                     vha->host_no, __func__,i, *mb, vha));
 227                                 qla2x00_async_event(vha, mb);
 228                                 break;
 229                         }
 230                 }
 231         }
 232 }
 233
 234 void
 235 qla2x00_vp_abort_isp(scsi_qla_host_t *vha)
 236 {
 237         /*
 238          * Physical port will do most of the abort and recovery work. We can
 239          * just treat it as a loop down
 240          */
 241         if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
 242                 atomic_set(&vha->loop_state, LOOP_DOWN);
 243                 qla2x00_mark_all_devices_lost(vha, 0);
 244         } else {
 245                 if (!atomic_read(&vha->loop_down_timer))
 246                         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 247         }
 248
 249         DEBUG15(printk("scsi(%ld): Scheduling enable of Vport %d...\n",
 250             vha->host_no, vha->vp_idx));
 251         qla24xx_enable_vp(vha);
 252 }
 253
 254 static int
 255 qla2x00_do_dpc_vp(scsi_qla_host_t *vha)
 256 {
 257         scsi_qla_host_t *ha = vha->parent;
 258
 259         if (test_and_clear_bit(VP_IDX_ACQUIRED, &vha->vp_flags)) {
 260                 /* VP acquired. complete port configuration */
 261                 if (atomic_read(&ha->loop_state) == LOOP_READY) {
 262                         qla24xx_configure_vp(vha);
 263                 } else {
 264                         set_bit(VP_IDX_ACQUIRED, &vha->vp_flags);
 265                         set_bit(VP_DPC_NEEDED, &ha->dpc_flags);
 266                 }
 267
 268                 return 0;
 269         }
 270
 271         if (test_and_clear_bit(ISP_ABORT_NEEDED, &vha->dpc_flags))
 272                 qla2x00_vp_abort_isp(vha);
 273
 274         if (test_and_clear_bit(RESET_MARKER_NEEDED, &vha->dpc_flags) &&
 275             (!(test_and_set_bit(RESET_ACTIVE, &vha->dpc_flags)))) {
 276                 clear_bit(RESET_ACTIVE, &vha->dpc_flags);
 277         }
 278
 279         if (test_and_clear_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags)) {
 280                 if (!(test_and_set_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags))) {
 281                         qla2x00_loop_resync(vha);
 282                         clear_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags);
 283                 }
 284         }
 285
 286         return 0;
 287 }
 288
 289 void
 290 qla2x00_do_dpc_all_vps(scsi_qla_host_t *ha)
 291 {
 292         int ret;
 293         int i, vp_idx_matched;
 294         scsi_qla_host_t *vha;
 295
 296         if (ha->parent)
 297                 return;
 298         if (list_empty(&ha->vp_list))
 299                 return;
 300
 301         clear_bit(VP_DPC_NEEDED, &ha->dpc_flags);
 302
 303         for_each_mapped_vp_idx(ha, i) {
 304                 vp_idx_matched = 0;
 305
 306                 list_for_each_entry(vha, &ha->vp_list, vp_list) {
 307                         if (i == vha->vp_idx) {
 308                                 vp_idx_matched = 1;
 309                                 break;
 310                         }
 311                 }
 312
 313                 if (vp_idx_matched)
 314                         ret = qla2x00_do_dpc_vp(vha);
 315         }
 316 }
 317
 318 int
 319 qla24xx_vport_create_req_sanity_check(struct fc_vport *fc_vport)
 320 {
 321         scsi_qla_host_t *ha = shost_priv(fc_vport->shost);
 322         scsi_qla_host_t *vha;
 323         uint8_t port_name[WWN_SIZE];
 324
 325         if (fc_vport->roles != FC_PORT_ROLE_FCP_INITIATOR)
 326                 return VPCERR_UNSUPPORTED;
 327
 328         /* Check up the F/W and H/W support NPIV */
 329         if (!ha->flags.npiv_supported)
 330                 return VPCERR_UNSUPPORTED;
 331
 332         /* Check up whether npiv supported switch presented */
 333         if (!(ha->switch_cap & FLOGI_MID_SUPPORT))
 334                 return VPCERR_NO_FABRIC_SUPP;
 335
 336         /* Check up unique WWPN */
 337         u64_to_wwn(fc_vport->port_name, port_name);
 338         if (!memcmp(port_name, ha->port_name, WWN_SIZE))
 339                 return VPCERR_BAD_WWN;
 340         vha = qla24xx_find_vhost_by_name(ha, port_name);
 341         if (vha)
 342                 return VPCERR_BAD_WWN;
 343
 344         /* Check up max-npiv-supports */
 345         if (ha->num_vhosts > ha->max_npiv_vports) {
 346                 DEBUG15(printk("scsi(%ld): num_vhosts %ud is bigger than "
 347                     "max_npv_vports %ud.\n", ha->host_no,
 348                     ha->num_vhosts, ha->max_npiv_vports));
 349                 return VPCERR_UNSUPPORTED;
 350         }
 351         return 0;
 352 }
 353
 354 scsi_qla_host_t *
 355 qla24xx_create_vhost(struct fc_vport *fc_vport)
 356 {
 357         scsi_qla_host_t *ha = shost_priv(fc_vport->shost);
 358         scsi_qla_host_t *vha;
 359         struct Scsi_Host *host;
 360
 361         host = scsi_host_alloc(&qla24xx_driver_template,
 362             sizeof(scsi_qla_host_t));
 363         if (!host) {
 364                 printk(KERN_WARNING
 365                     "qla2xxx: scsi_host_alloc() failed for vport\n");
 366                 return(NULL);
 367         }
 368
 369         vha = shost_priv(host);
 370
 371         /* clone the parent hba */
 372         memcpy(vha, ha, sizeof (scsi_qla_host_t));
 373
 374         fc_vport->dd_data = vha;
 375
 376         vha->node_name = kmalloc(WWN_SIZE * sizeof(char), GFP_KERNEL);
 377         if (!vha->node_name)
 378                 goto create_vhost_failed_1;
 379
 380         vha->port_name = kmalloc(WWN_SIZE * sizeof(char), GFP_KERNEL);
 381         if (!vha->port_name)
 382                 goto create_vhost_failed_2;
 383
 384         /* New host info */
 385         u64_to_wwn(fc_vport->node_name, vha->node_name);
 386         u64_to_wwn(fc_vport->port_name, vha->port_name);
 387
 388         vha->host = host;
 389         vha->host_no = host->host_no;
 390         vha->parent = ha;
 391         vha->fc_vport = fc_vport;
 392         vha->device_flags = 0;
 393         vha->instance = num_hosts;
 394         vha->vp_idx = qla24xx_allocate_vp_id(vha);
 395         if (vha->vp_idx > ha->max_npiv_vports) {
 396                 DEBUG15(printk("scsi(%ld): Couldn't allocate vp_id.\n",
 397                         vha->host_no));
 398                 goto create_vhost_failed_3;
 399         }
 400         vha->mgmt_svr_loop_id = 10 + vha->vp_idx;
 401
 402         init_completion(&vha->mbx_cmd_comp);
 403         complete(&vha->mbx_cmd_comp);
 404         init_completion(&vha->mbx_intr_comp);
 405
 406         INIT_LIST_HEAD(&vha->list);
 407         INIT_LIST_HEAD(&vha->fcports);
 408         INIT_LIST_HEAD(&vha->vp_fcports);
 409
 410         vha->dpc_flags = 0L;
 411         set_bit(REGISTER_FDMI_NEEDED, &vha->dpc_flags);
 412         set_bit(REGISTER_FC4_NEEDED, &vha->dpc_flags);
 413
 414         /*
 415          * To fix the issue of processing a parent's RSCN for the vport before
 416          * its SCR is complete.
 417          */
 418         set_bit(VP_SCR_NEEDED, &vha->vp_flags);
 419         atomic_set(&vha->loop_state, LOOP_DOWN);
 420         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 421
 422         qla2x00_start_timer(vha, qla2x00_timer, WATCH_INTERVAL);
 423
 424         host->can_queue = vha->request_q_length + 128;
 425         host->this_id = 255;
 426         host->cmd_per_lun = 3;
 427         host->max_cmd_len = MAX_CMDSZ;
 428         host->max_channel = MAX_BUSES - 1;
 429         host->max_lun = MAX_LUNS;
 430         host->unique_id = vha->instance;
 431         host->max_id = MAX_TARGETS_2200;
 432         host->transportt = qla2xxx_transport_vport_template;
 433
 434         DEBUG15(printk("DEBUG: detect vport hba %ld at address = %p\n",
 435             vha->host_no, vha));
 436
 437         vha->flags.init_done = 1;
 438         num_hosts++;
 439
 440         down(&ha->vport_sem);
 441         set_bit(vha->vp_idx, ha->vp_idx_map);
 442         ha->cur_vport_count++;
 443         up(&ha->vport_sem);
 444
 445         return vha;
 446
 447 create_vhost_failed_3:
 448         kfree(vha->port_name);
 449
 450 create_vhost_failed_2:
 451         kfree(vha->node_name);
 452
 453 create_vhost_failed_1:
 454         return NULL;
 455 }